Error Lookup Service Registry Entries

Error lookup services are identified in the registry by the ExtendedErrors subkey under the class ID of the error lookup service. Under HKEY_CLASSES_ROOT, error lookup services must have the following subkeys and values for programmatic identifier (ProgID):

Keys and Subkeys								Values
HKEY_CLASSES_ROOT
	ProviderProgIDErrors							FriendlyDisplayName
		CLSID						LookupCLSID
			ProviderCLSID
				ExtendedErrors				FriendlyDisplayName
					LookupCLSID			Description or DisplayName
						ProgID		LookupProgID
						VersionIndependentProgID		VersionIndependentProgID
						InprocServer32		ErrorLookupServiceDLLFilename
							ThreadingModel	Apartment\|Free\|Both

Note that the first two class ID entries are entered under the class ID of the provider to identify the error lookup service for that provider. For more information about error lookup services, see "Error Lookup Services" in Chapter 13.